It works
You need this app for school laptops of high school teens. I did trust my kids. But they wanted to chat online in class. They wanted to download games in class. It lets you block installed apps and block websites and categories of websites. It lets you monitor screen time and set curfews. It lets you see what words they use to search. Ideally as your kids get older you can lessen the controls but for early teens its a must. Over time you move to warning instead of blocking. Ideally, you should not have your child be an admin user of the laptop you monitor.